A158265 - cp's OEIS frontend

A158265 G.f.: A(x) = exp( Sum_{n>=1} 2sigma(n,n+1)x^n/n ).

n	a(n)
0	1
1	2
2	11
3	74
4	697
5	8002
6	115158
7	1949640
8	38662510
9	872245634
10	22150393253
11	623661939852
12	19296665400632
13	650198159192554
14	23700604926216759
15	928939297013294294
16	38956230043045053042
17	1740248411222193973416

[1, 2, 11, 74, 697, 8002, 115158, 1949640, 38662510, 872245634, 22150393253, 623661939852, 19296665400632, 650198159192554, 23700604926216759, 928939297013294294, 38956230043045053042, 1740248411222193973416]

cp's OEIS Frontend

A158265 G.f.: A(x) = exp( Sum_{n>=1} 2sigma(n,n+1)x^n/n ).

Table of values

List of values

cp's OEIS Frontend

A158265 G.f.: A(x) = exp( Sum_{n>=1} 2*sigma(n,n+1)*x^n/n ).

Table of values

List of values

A158265 G.f.: A(x) = exp( Sum_{n>=1} 2sigma(n,n+1)x^n/n ).